Hand-drill.



. No. 652,|37, Ptented lune-|9, |900.

J. E. OLSON. HAND DRILL.

(Appxication filed Apr. 3, 1900.) (No Model.)

UNITED STATES PATENT OEEICE.

JOHN E. OLSON, OF CHICAGO, ILLINOIS.

HAND-DRILL.

SPECIFICATION' formingpart of Letters Patent No. 652,137, dated June 19,1909. pplication filed April 3, 1900. Serial No. 11,848. (No model.)

To all whont it may concern: lle it known that I, JOHN E. OLSON, acitizen of the United States, residing at Chicago,

in the county of Cook and State of Illinois,

have invented new and useful Improvements in Hand-Drills, of which thefollowing is a specification.

This invention relates to hand-drills, and

has for one object to provide a double-acting ratchet-drill of improvedconstruction wherein the reciprocating movement of the hand actuatingmechanism is converted into a continuous rotary movement by the doubleratchet mechanism, whereby the drill or boring-tool is continuouslyrotated in the proper direction to effect the drilling orboringoperation. It has for its further object to provide a hand-drill of thecharacter described which shall be simple and inexpensive inconstruction and efcient and rapid in operation.

To these ends my invention consists in the features and in theconstruction, combination, and arrangement of parts hereinafterdescribed, and particularly pointed out in the claims following thedescription, reference being had to the accompanying drawings, forming apart of this specification, wherein- Figure l is a 4longitudinalsectional view of my improved drill. Figs. 2 and 3 are detail viewsillustrating the manner in which the bolt alternately engages theratchet-wheels. Fig. 4 is a face view of one of the ratchetwheels. Fig.5 is a transverse sectional View of the same. Fig. 6 is a top plan Viewofthe hub. Fig. 7 is a side elevation of the saine. Fig. 8 is aview'showing the bolt in side and front elevation.

Referring to the drawings, the numeral l indicates a casing forinclosing the ratchet mechanism and comprising two semi-ellipsoidalshells 2, each provided with semicylindrical extensions 3 at itsopposite ends, said shells being arranged face to face and securedtogether by ferrules 4, fitted over the extensions 3. The two shells,constructed and secured together in the manner described, form a hollowbulb-like casing, which may be conveniently grasped in the hand of vtheoperator. Disposed in` the upper part of the casing 1 .is a beveledgear-wheel 5, centrally cored, as at, and fixed in said gear-wheel isthe lower end of a spirally grooved or threaded rod 7. Sleeved upon therod 7 is a tube 8, provided atits lower end with a nut 9,which engagesthe spiral grooves or threads on the rod 7, and said tube is provided atits opposite end with a handle 9a, of any approved or preferredconstruction, suitable to be grasped in the hand of the operator. 'Byholding the casing 1 stationary and reciprocating the tube S on thespirally-grooved rod 7 said rod and the beveled pinion 5, fixed thereon,will be alternately rotated in opposite directions in a well-knownmanner. Passing through the lower end of the casing l is a shaft 10, onthe upper end of which is formed a barrel or hub l1, the extreme upperend 12 of said shaft being loosely tted in the centrally-cored portion Gof the beveled pinion 5, which forms a journal-bearing therefor.Disposed in the lower portion of the casing and journaled on the shaft10 is a beveled gear-wheel 13, corresponding in shape and size to thegear-wheel 5, and screwed into the sections 2 2 of the casing are twoscrews 14, which serve as journals, on which are journaled beveledgear-wheels 15, which gear thebeveled gear-wheels 5 and 13 together. Ittherefore follows that if the beveled gear-wheel 5 be rotated in eitherdirection the gear-wheel 13 will be rotated in the reverse direction. Onthe inner adjacent faces of the gear-wheels are formed ratchetteeth 1G,the teeth being arranged in the form of a circle on each gear-wheel andthe teeth on one gear-wheel being arranged in a reverse direction tothose of the other gear-wheel. Formed in the opposite vertical sides ofthe barrel or hub 11 are two vertical dovetailed grooves 17, in each ofwhich is arranged to freely reciprocate a bolt 18, the opposite ends ofwhich are reversely inclined or beveled, as shown at 19 and 20, saidbolt being dovetailed in cross-section to Iit the dovetailed groove inthe barrel or hub in which it plays. The bolts 18 are of such lengththat when one'end of either of said bolts is in engagement with theratchet-teeth of one of the beveled gearwheels its opposite end will beout of engagement with the ratchet-teeth of the other gearwheel.

On the outer end of the shaft l() is fixed a IOO chuck 21, ofanysuitable or preferred con- ]sOtructiou, which operates to hold the drillor The operation of my improved device is as follows: The drill, bit, orother boring-tool is placed in the chuck 21 in the usual manner, andbeing centered at the point to be bored the casing 1 is grasped in onehand and the ,handle 9a in the other hand. The operator holds the casingstationary, pressing it slightly toward the work, and with the otherhand reciprocates the tube S backward and forward over the rod 7. As thetube 8, and with it the nut 9, is moved in one direction it rotates therod 7 and with it the beveled gear-wheel 5 in a certain direction, andthrough themedium of the intermediate gear-wheels 15 rotates the otherbeveled gear-wheel 13 in a reverse direction. For example, let it beassumed that when the nut is forced toward the casing the ratchet-Wheels5 and 13 will be revolved in the directions indicated by the arrows inFig. 2then the lower beveled ends 2O of the bolts 18 will engage theratchetteeth of-the wheel 13 and will cause the barrel or hub 11, andconsequently the boringtool, to rotate in the same direction as thewheel 13, the ratchet-teeth of the wheel 5 passing idly over the upperends 19 of the bolts. When thenut 9 is moved in the reverse direction,howeverthat is to say, away from the casing l-then the wheels 5 and 13will also be moved in the reverse direction or in the directionsindicated by the arrows in Fig. 3, and the ratchet-teeth acting on thebeveled ends 2O of the bolts 1S will force the latter endwise toward thewheel 5 and into engagement with the ratchet-teeth on the latter, andthe barrel or hub 11, and with it the boring-tool, will then rotate withthe said wheel v5, the movement of which is now the reverse of thatbefore described. It will be readily understood, therefore, that theboringtool will always be rotated in one certain direction or in adirection to cause the tool to enter the work irrespective of thedirection in which the nut 9 is moved on the spirally-grooved rod 7.

I have shown and described two bolts 18 as engaging the ratchet-teeth onthe beveled gear-wheels; butit will be evident that a single bolt may beemployed for the purpose, though two bolts are preferred, as sucharrangement more equally distributes the strain on the parts and causesthe device to operate more evenly.

Having described my invention, what I claim is 1. In a hand-drill, thecombination with a spirally-grooved rod andanut sleeved thereon andoperating when reciprocated to rotate said rod alternately in oppositedirections, a

tool-holder, and double-acting ratchet mechanism actuated by said rodfor rotating the drillholder continuously in one direction,substantially as described.

2. In a hand-drill, the combination with a spirally-groovcd rod and anut sleeved thereon and operating when reciprocated to rotate said rodalternately in opposite directions, a toolholder, and ratchet-gearinginterposed between the said rod and tool-holder and actuated by the saidrod, said ratchet-gearing being constructed and arranged to rotate thetool-holder continuouslyin olie direction, substantially as described.

3. In a drill, the combination with a casing, of two oppositely-arrangedwheels gearedtogether to rotate in opposite directions, aspirally-grooved rod and nut for rotating one of -said wheelsalternately in opposite directions,

a tool-holder, and means for automatically connecting said tool-holderalternately with said wheels as the movement of the latter is reversed,whereby the tool-holder is rotated continuously in one direction,substantially as described.

4. In adrill, the combination with a casing, oftwo oppositely-arrangedwheels geared together to rotate in opposite directions, means forrotating one of said Wheels alternately in opposite directions, atool-holder, a sliding connection carried by the tool-holder and meansfor automatically throwing said connection alternately into engagementwith said wheels, substantially as described.

5. In a drill, the combination with a casing, of two oppositely-arrangedwheels geared together to rotate in opposite directions and provided ontheir adjacent faces with oppositely-arranged ratchet-teeth, of atool-holder, a sliding bolt arranged to alternately engage saidratchet-teeth, and means for alternately rotating one of said wheels inopposite directions, substantially as described.

6. In a drill, the combination with a casing, of two oppositely-arrangedwheels geared together to rotate in opposite directions and provided ontheir adjacent faces with reverselyarranged ratchet-teeth, of a hubrotatably arranged between said Wheels and carrying a sliding boltbeveled on its opposite ends and arranged to alternately engage saidwheels, a tool-chuck carried by said hub, and means for alternatelyrotating one of said wheels in opposite directions, substantially asdescribed.

7. In adrill, the combination with a casing, of two oppositely-arrangedwheels geared together to rotate in opposite directions and provided ontheir adjacent faces with reversely-arranged ratchet-teeth, of a hubrotatably arranged between said wheels and carrying a sliding boltreversely beveled on its opposite ends and arranged to alternatelyengage said wheels,'a tool-chuck carried by said hub, and means foralternately rotating one of said wheels in opposite directions,substantially as described.

8. In a drill, the combination with a casing, of two oppositely-arrangedwheels geared together to rotate in opposite directions and provided ontheir adjacent faces with reversely-disposed ratchet-teeth, of a hub ro-ICO IIO

tatably arranged between said Wheels and provided on its periphery witha dovetailed groove, a bolt slidably arranged in said groove andreversely beveled on its opposite ends, said bolt being arranged toalternately engage said ratchet-teeth, means for alternately rotatingone of said wheels in opposite directions, and a tool-chuck carried bysaid hub, substantially as described.

9. In a drill, the combination With a casing, of two oppositely-arrangedWheels geared together to rotate in opposite directions and provided ontheir adjacent faces with reversely disposed ratchet teeth, of a shaftpassing loosely through said casing and one of said wheels, a hubcarried by the shaft and provided on its periphery with a dovetailedgroove, a bolt slidably arranged in said groove and reversely beveled onits opposite ends, said bolt being arranged to alternately engage saidratchet-teeth, a toolchuck xed on the free end of the shaft, and meansfor alternately rotating one of the said Wheels in opposite directions,substantially as described.

l0. n a drill, the combination with the hollow casing, of the beveledgear-wheels arranged in the opposite ends thereof and provided on theiradjacent faces with reverselyarranged ratchet teeth, said wheels beinggeared together to rotate in opposite directions, a shaft passingloosely through the casing and one of said wheels, a hub carried by theshaft and provided on its periphery with a dovetailed groove, a boltslidably arranged in said groovevand reversely beveled on its oppositeends, said bolt being arranged to alternately engage said ratchet-teeth,a toolchnck xed on the free end of the shaft, a spirally grooved rodfixed in one of said Wheels, a nut sleeved on said rod, and means forreciprocating said nut on the rod in opposite directions, substantiallyas described.

In testimony whereof I have hereunto set my hand in presence of tWosubscribing Witnesses.

JOHN E. OLSON.

Witnesses:

Anvln ERICKSON, W. O. BLooMQUIsT.

